轻量化大面积嵌套聚焦型X射线望远镜

doi:10.7527/S1000-6893.2022.26671

Abstract

Abstract:

Nested focusing X-ray telescopes have a wide range of demands in the fields of pulsar autonomous navigation and X-ray astronomy. The optical optimization design of a compact， large-area， and nested focusing X-ray telescope is carried out in this paper， and the process of thermoforming， precision mirror cutting， and nested coaxial confocal of X-ray grazing incidence mirrors are successfully explored based on lightweight flat glass. A lightweight， large-area， Nested Focusing X-ray Telescope （NFXT） has been developed. The axial length of single-layer mirror of NFXT is 300 mm， and the thickness is 0.3 mm. The Ir metal film is sputtered on the reflective surface of curved mirror with 300 nm thickness， and the roughness of the metal coating is better than 0.3 nm（rms）. The NFXT has 11 layered nested mirrors in the radial direction， with each layer consisting of three equal sectors in the circumference direction. The inner 8 layers are the conical mirrors that are approximately parabolic， and the outer 3 layers are parabolic mirrors. The 11 layers of mirrors are assembled into the same axis and same focus. The net geometric area of the NFXT engineering prototype is 175 cm²， with the effective area being 130 cm²@1.5keV， and the focal spot radius of 0° field of view being 0.85 mm （EoE=50%）. The engineering prototype weighs 4.25 kg， having an envelope size of diameter×height 200 mm×326 mm， 0.2-12 keV energy response range and back working distance of 1 300 mm. The breakthrough of the NFXT technology provides key technical support for the domestic pulsar navigation experiments and advanced X-ray astronomical satellites.

Key words: Pulsar navigation, nested focusing X-ray telescope, grazing incidence parabolic mirrors, X-ray focusing, X-ray astronomical satellite

CLC Number:

V448.2

Baoquan LI, Haitao LI, Yang CAO, Peng SANG, Yaning LIU, Daochun YU. Nested focusing X-ray telescope with lightweight and large photon collecting area[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023, 44(3): 526671.

Figures/Tables 13

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镜面序号i	P参数/cm	δy/cm	出射左端点x坐标/cm	出射左端点y坐标/cm	左端掠射角/（°）	入射右端点x坐标/cm	入射右端点y坐标/cm	右端掠射角/（°）	有效面积 /cm²@1.5 keV
1	0.243 140 0	0.865 009 9	131.589 8488	8.000 000 0	1.740 826 1	161.489 848 8	8.865 009 9	1.571 053 4	40.478 78
2	0.198 033 4	0.779 598 3	131.530 7714	7.220 401 7	1.571 053 4	161.489 848 8	8.000 000 0	1.418 020 5	32.412 49
3	0.161 335 8	0.702 886 5	131.564 0688	6.517 515 2	1.418 020 5	161.489 848 8	7.220 401 7	1.280 028 5	25.957 31
4	0.131 465 6	0.633 918 5	131.591 1739	5.883 596 7	1.280 028 5	161.489 848 8	6.517 515 2	1.155 563 6	20.738 08
5	0.107 143 7	0.571 861 4	131.613 2460	5.311 735 3	1.155 563 6	161.489 848 8	5.883 596 7	1.043 273 7	16.542 79
6	0.087 333 4	0.515 984 7	131.631 2248	4.795 750 6	1.043 273 7	161.489 848 8	5.311 735 3	0.941 948 8	13.154 49
7	0.071 193 8	0.465 645 4	131.645 8731	4.330 105 2	0.941 948 8	161.489 848 8	4.795 750 6	0.850 504 0	10.435 00
8	0.058 042 2	0.420 274 2	131.657 8100	3.909 831 0	0.850 504 0	161.489 848 8	4.330 105 2	0.767 965 7	8.216 466
9	0.047 323 5	0.379 365 8	131.667 5389	3.530 465 2	0.767 965 7	161.489 848 8	3.909 831 0	0.693 458 6	6.408 405
10	0.038 586 6	0.342 470 2	131.675 4693	3.187 995 0	0.693 458 6	161.489 848 8	3.530 465 2	0.626 195 8	4.961 756
11	0.031 464 3	0.309 185 7	131.681 9343	2.878 809 4	0.626 195 8	161.489 848 8	3.187 995 0	0.565 468 8	3.793 717

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Nested focusing X-ray telescope with lightweight and large photon collecting area

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